DateOnly Extension demonstration

test/ExtendedXmlSerializer.Tests.ReportedIssues/Issue608Tests.cs

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+using ExtendedXmlSerializer.Configuration;
+using ExtendedXmlSerializer.ContentModel.Conversion;
+using ExtendedXmlSerializer.Tests.ReportedIssues.Support;
+using FluentAssertions;
+using System;
+using Xunit;
+
+namespace ExtendedXmlSerializer.Tests.ReportedIssues
+{
+	public sealed class Issue608Tests
+	{
+#if CORE
+		public class TestClass
+		{
+			public DateOnly DateOfBirth { get; set; }
+		}
+
+		[Fact]
+		public void Verify()
+		{
+			TestClass instance = new()
+			{
+				DateOfBirth = DateOnly.Parse("2024-01-22")
+			};
+
+			var serializer = new ConfigurationContainer().UseAutoFormatting()
+			                                             .UseOptimizedNamespaces()
+			                                             .Type<DateOnly>()
+			                                             .Register()
+			                                             .Converter()
+			                                             .Using(DateOnlyConverter.Default)
+			                                             .ForTesting();
+
+			serializer.Cycle(instance).Should().BeEquivalentTo(instance);
+		}
+
+		sealed class DateOnlyConverter : ConverterBase<DateOnly>
+		{
+			public static DateOnlyConverter Default { get; } = new();
+
+			DateOnlyConverter() {}
+
+			public override DateOnly Parse(string data) => DateOnly.Parse(data);
+
+			public override string Format(DateOnly instance) => instance.ToString();
+		}
+#endif
+	}
+}